From fcca826a63c79168f82a48c2620312630a83080a Mon Sep 17 00:00:00 2001 From: Mans Rullgard Date: Wed, 28 Sep 2011 14:33:21 +0100 Subject: [PATCH] dsputil: add vector_fmac_scalar() Signed-off-by: Mans Rullgard --- libavcodec/dsputil.c | 9 +++++++++ libavcodec/dsputil.h | 11 +++++++++++ 2 files changed, 20 insertions(+) diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c index 039cf0b213..967406eedf 100644 --- a/libavcodec/dsputil.c +++ b/libavcodec/dsputil.c @@ -2455,6 +2455,14 @@ static void vector_fmul_scalar_c(float *dst, const float *src, float mul, dst[i] = src[i] * mul; } +static void vector_fmac_scalar_c(float *dst, const float *src, float mul, + int len) +{ + int i; + for (i = 0; i < len; i++) + dst[i] += src[i] * mul; +} + static void butterflies_float_c(float *restrict v1, float *restrict v2, int len) { @@ -2994,6 +3002,7 @@ av_cold void dsputil_init(DSPContext* c, AVCodecContext *avctx) c->scalarproduct_float = scalarproduct_float_c; c->butterflies_float = butterflies_float_c; c->vector_fmul_scalar = vector_fmul_scalar_c; + c->vector_fmac_scalar = vector_fmac_scalar_c; c->shrink[0]= av_image_copy_plane; c->shrink[1]= ff_shrink22; diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h index 4d783cf266..73830f8190 100644 --- a/libavcodec/dsputil.h +++ b/libavcodec/dsputil.h @@ -423,6 +423,17 @@ typedef struct DSPContext { */ void (*vector_fmul_scalar)(float *dst, const float *src, float mul, int len); + /** + * Multiply a vector of floats by a scalar float and add to + * destination vector. Source and destination vectors must + * overlap exactly or not at all. + * @param dst result vector, 16-byte aligned + * @param src input vector, 16-byte aligned + * @param mul scalar value + * @param len length of vector, multiple of 4 + */ + void (*vector_fmac_scalar)(float *dst, const float *src, float mul, + int len); /** * Calculate the scalar product of two vectors of floats. * @param v1 first vector, 16-byte aligned